Phosphine

Q.

47. List of electron withdrawing group and electron donating group and their priority order ?

Q. 3. What is the hybridisation of central atom in O3?

Q. 22. The energy of the second Bohr orbit in hydrogen atom is -3.41eV . The energy of the second Bohr orbit of He (+1) ion would be ?

Q. 29. If the total energy of an electron is -1.5eV in hydrogen atom then find out K.E. , P.E., orbit, radius and velocity of the electron in that orbit.

Q.

Phosphine is obtained by the reaction when:

1. White phosphorus is heated with $NaOH$.

2. $C{a}_3{P}_2$ reacts with water.

3. Red phosphorus is heated with $NaOH$.

4. Phosphorus is heated in a current of hydrogen.

Q.

Which of the following is a tetrabasic acid

1. Orthophosphorus acid

2. Orthophosphoric acid

3. Metaphosphoric acid

4. Pyrophosphoric acid

Q. 37. What is hybridisation of central atom in NO2

Q. 3. What is the hybridisation of central atom in O3?

Q. Which of the following are accurate regarding the phosphine?

1. Phosphine is toxic and has a rotten-fish smell
2. Phosphine is non-toxic
3. Phosphine is a useful fertilizer
4. Phosphine is odourless

Q. The energy of second bohr orbit of the hydrogen atom is -328kj/mole hence the energy of fourth bohr orbit will be

Q. what is the central atom hybridisation for co

Q.

Phosphine when heated in the absence of air decomposes into $P_{4}and{H}_{2}O$ - True of False?

1. True

2. False

Q.

Phosphine is a colourless, odourless gas at room temperature - True or False?

1. True

2. False

Q. $AsC{l}_3+NaB{H}_4\to P+NaCl+BC{l}_3$
Mark the correct option(s) which is/are true for compound $P$:

1. It thermally decomposes into a poisonous element and hydrogen
2. It is $s{p}^3$ hybridised with a bond angle close to that of $N{H}_3$
3. It readily oxidises in the presence of air
4. With solid $AgN{O}_3,P$ reacts to produce a yellow compound, $P$ reacts with a solution of $AgN{O}_3$ to give a black compound

Q. Explain briefly
Q. The group which is most activating is
(1) $—N{O}_2$
(2) $—OC{H}_3$
(3) $—N{H}_2$
(4) $—OH$

Q. Among the following, the correct statement(s) is/are:
Between $N{H}_3$ and $P{H}_3$

1. $N{H}_3$ is a better electron donor because the lone pair of electrons occupies the spherical $s$ orbital and is less directional
2. $P{H}_3$ is a better electron donor because the lone pair of electrons occupies the $s{p}^3$ orbital and is more directional
3. $N{H}_3$ is a better electron donor because the lone pair of electrons occupies the $s{p}^3$ orbital and is more directional
4. $P{H}_3$ is a better electron donor because the lone pair of electrons occupies the spherical $s$ orbital and is less directional

Q.

When in contact with traces of oxidizing agents like $C{l}_2$, Phosphine explodes- True or False?

1. True

2. False